@halukakaNOSPAM: "Hello Everyone,
I suspect being attacked by someone and I'd like to close ALL the ports 
excepts those used by the following clients:
MS Messenger, Internet Explorer, Outlook Express (both news and email), 
Windows Media Player 9 and IIS Ftp Server (my personal ftp server running on 
this computer).
What port numbers should I keep open. Also, is closing all ports except the 
ones listed above is a wise thing to do? If I closed everything except these 
would I be missing an important port or two?
Note: I have WinXP SP2 for OS with SP2 firewall disabled and Tiny Personal 
Firewall for firewall.
Thanks and Regards,
Haluk "
    @neosad1st: "<quote>
Please do not be lazy.  You have google: use it.  All of those ports can be
found online very easily.
BOFH Excuse #121: halon system went off and killed the operators."
    @n9rou: "The most important ports to control are the inbound ports. You should only
leave the inbound open for services you offer to internet users if any. Most
users do not ned to have any ports open for inbound access. I don't know if
your ftp server is for internet users or your own lan as that may be the
only exception i see in your list. If you also want to control outbound
access, one easy way would be to reconfigure your firewall to default and
then let it prompt you for access and then you can make a decision as to
allow it permanently or not.
Common "outbound" ports are 20 and 21 TCP for FTP to the server. Note there
is active and passive FTP as described in the link below.
<url>
Other common outbound ports are 80 and 443 TCP for regular and secure
websites, ports 25,110, and 119 TCP for mail and news, and port 53 UDP for
dns requests. MSN uses 1863 TCP and Media Player uses 1755 TCP. ICMP is used
for ping if you plan on using that.
While you are connected to the internet you can use the command line
netstat -an to see your current connections or I like to use the free
TCPView tool from Sysinternals to see port mappings that also show
application associated with port use.  - Steve
<url>
news:<email_address>
<quote>
on
the
these"
    @nobody: "Only one that should need special configuration is the FTP server. I haven't
used
Tiny Firewall but if it like others I have used it probably has a
configuration screen
for apps where you can grant or deny access as needed, either inbound or
outbound.
news:<email_address>
<quote>
on"
    @av: "You should close every port that you do not need. There is no harm in closing all ports for inbound traffic. Check 
<url> to see what ports do you have open on our machine.
<quote>"
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